WO2017123900A1 - Pompe à soupape de sûreté thermostatique - Google Patents

Pompe à soupape de sûreté thermostatique Download PDF

Info

Publication number
WO2017123900A1
WO2017123900A1 PCT/US2017/013375 US2017013375W WO2017123900A1 WO 2017123900 A1 WO2017123900 A1 WO 2017123900A1 US 2017013375 W US2017013375 W US 2017013375W WO 2017123900 A1 WO2017123900 A1 WO 2017123900A1
Authority
WO
WIPO (PCT)
Prior art keywords
thermostatic
pump housing
relief valve
poppet
actuator
Prior art date
Application number
PCT/US2017/013375
Other languages
English (en)
Inventor
Robert R. Kimberlin
Original Assignee
Standex International Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Standex International Corporation filed Critical Standex International Corporation
Priority to EP17704113.4A priority Critical patent/EP3403011B1/fr
Priority to ES17704113T priority patent/ES2922523T3/es
Publication of WO2017123900A1 publication Critical patent/WO2017123900A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/06—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using expansion or contraction of bodies due to heating, cooling, moistening, drying or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/003—Safety valves; Equalising valves, e.g. pressure relief valves reacting to pressure and temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/002—Actuating devices; Operating means; Releasing devices actuated by temperature variation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7737—Thermal responsive

Definitions

  • This disclosure relates to the field of fluid pumps. More particularly, this disclosure relates to a pressure and thermostatic relief valve for a pump and to a pump housing incorporating such a relief valve.
  • Positive displacement pumps commonly include a pressure relief device in the event of extreme overpressurization within the pump. Excess pressure may be released through this device, thereby preventing catastrophic valve of the pump. Even in the absence of extreme overpressurization, however, pumps may still be damaged by overheating if the discharge flow is partially or fully blocked. In such case, water or other pumped fluids heat up within the pump and may flash into the vapor phase. In this situation, the pump can be heavily damaged due to thermal expansion of the parts during this overheating.
  • the pressure and thermostatic relief valve includes at least the following components: (1) a pressure relief valve housing having a passage for selectively providing flow communication between a pump housing discharge side and a pump housing suction side; (2) a pressure relief actuator positioned at least partially within the passage and movable between a closed position preventing flow communication between the discharge side and the suction side and an open position allowing flow communication between the discharge side and the suction side; and (3) a pressure relief spring for biasing the pressure relief actuator in the closed position until a pressure difference between the discharge side and the suction side exceeds a predetermined amount.
  • the pressure relief actuator further includes a thermostatic relief valve.
  • This thermostatic relief valve includes at least the following components: (a) a thermostatic relief valve shell having an elongate inner bore, a first opening in communication with the pump housing discharge side and a second opening in communication with the pump housing suction side; (b) a wax thermostatic element disposed within the shell bore; (c) a thermostatic actuator piston movably disposed within the shell bore adjacent the thermostatic element so that expansion of the wax thermostatic element under elevated temperature conditions moves the thermostatic actuator piston from a first position to a second position; (d) a poppet movable between a closed position and an open position and disposed within the shell bore adjacent the thermostatic actuator piston so that movement of the thermostatic actuator piston from the first position to the second position causes the poppet to move from the closed position to the open position, wherein the poppet prevents fluid flow between the first and second shell openings in the closed position and the poppet permits fluid flow between the first and second shell openings in the open position; and (e) a thermostat
  • the pressure and thermostatic relief valve preferably also includes an adjustment screw for partially compressing the pressure relief spring and thereby varying the bias on the pressure relief actuator.
  • the present disclosure provides a pump housing.
  • the pump housing includes at least a suction side pump housing portion including a fluid inlet port, a discharge side pump housing portion including a fluid outlet port, and a pressure and thermostatic relief valve assembly.
  • the pressure and thermostatic relief valve assembly includes at least the following components: (1) a pressure relief valve housing having a passage for selectively providing flow communication between a pump housing discharge side and a pump housing suction side; (2) a pressure relief actuator positioned at least partially within the passage and movable between a closed position preventing flow communication between the discharge side and the suction side and an open position allowing flow communication between the discharge side and the suction side; and (3) a pressure relief spring for biasing the pressure relief actuator in the closed position until a pressure difference between the discharge side and the suction side exceeds a predetermined amount.
  • the pressure relief actuator further includes a thermostatic relief valve.
  • This thermostatic relief valve includes at least the following components: (a) a thermostatic relief valve shell having an elongate inner bore, a first opening in communication with the pump housing discharge side and a second opening in communication with the pump housing suction side; (b) a wax thermostatic element disposed within the shell bore; (c) a thermostatic actuator piston movably disposed within the shell bore adjacent the thermostatic element so that expansion of the wax thermostatic element under elevated temperature conditions moves the thermostatic actuator piston from a first position to a second position; (d) a poppet movable between a closed position and an open position and disposed within the shell bore adjacent the thermostatic actuator piston so that movement of the thermostatic actuator piston from the first position to the second position causes the poppet to move from the closed position to the open position, wherein the poppet prevents fluid flow between the first and second shell openings in the closed position and the poppet permits fluid flow between the first and second shell openings in the open position; and (e) a thermostat
  • the thermostatic relief valve preferably also includes a thermostatic actuator return spring disposed within the shell bore and biased against at least a portion of the thermostatic actuator piston for returning the actuator piston from the second position to the first position.
  • the pressure and thermostatic relief valve preferably also includes an adjustment screw for partially compressing the pressure relief spring and thereby varying the bias on the pressure relief actuator.
  • the suction side pump housing portion and the discharge side pump housing portion each preferably are made from a molded polymer material.
  • FIG. 1 is a perspective cross-sectional view of a pump housing according to one embodiment of the present disclosure
  • FIG. 2 is an elevation, cross-sectional view of a relief valve according to one embodiment of the present disclosure
  • FIG. 3 is an additional elevation, cross-sectional view of a relief valve according to one embodiment of the present disclosure.
  • FIG. 4 is a perspective view of a relief valve illustrating fluid flow through the relief valve according to one embodiment of the present disclosure.
  • the present disclosure provides a pressure and thermostatic relief valve, and a pump housing incorporating such a relief valve.
  • the pressure and thermostatic relief valve, and the pump housing incorporating the relief valve are particularly suited for pumping water for use in beverages, such as for pumping water in carbonated water systems, for espresso machines, and beer cooling systems.
  • the pump housing 10 includes at least a suction side pump housing portion 12 including a fluid inlet port 14, a discharge side pump housing portion 16 including a fluid outlet port 18, and a further port 20 for receiving a relief valve assembly 22.
  • the pump housing 10 defines an interior pump cavity 24, with each of the inlet and outlet ports 14, 18 as well as the relief valve assembly 22 being in flow communication with the pump housing cavity 24.
  • the pump housing 10 may be cast or machined from metal, such as brass or stainless steel.
  • the pump housing is of a one- piece molded plastic construction, and the plastic material may be reinforced with fibers such as glass fibers for added strength and temperature resistance. More preferably, the pump housing is of a one-piece net-shape molded plastic construction.
  • net-shape molded means that after the housing is molded it is substantially ready for use and does not require any further significant machining or shaping or polishing, such as the type typically accomplished using computer numerical controlled (CNC) equipment. That is, the terminology “net-shape molded” as used herein will be understood to mean that the housing as molded is substantially ready for use and any additional machining is de minimis and less than about one square inch of the wetted interior surface (i.e., the portion of the interior surface in contact with pumped fluids) is subjected to further machining after being formed by molding.
  • CNC computer numerical controlled
  • the housing as molded preferably does not require further machining, shaping, polishing, or otherwise treatment to be ready to use, the wetted surfaces are not disturbed so as to expose glass fiber to the wetted surface and render the pump unacceptable for food-grade applications.
  • pump housings made of glass filled plastics can be made to meet glass fiber limits for food and beverage applications such that the total glass fiber exposure is maintained at or below 1 in 2 total exposure.
  • manufacturing costs associated with further treatment are saved.
  • the pump housing 10 is compatible with a variety of internal pump components which may be installed therein to provide a completed pump.
  • the completed pump may be configured as a positive displacement vane pump having various moving and static pump parts that cooperate with the pump housing, such as an end cap, endplate, o-rings, bearings, seals, liner, rotor, vanes, alignment pins, snap rings, shaft, inlet and/or outlet port inserts, washers, inlet strainer, and the like.
  • the completed pump may be coupled, as by bolting or clamping or otherwise connecting to a pump motor, such as an integrated or external electric motor, having an output shaft.
  • a pressure and thermostatic relief valve assembly 22 is inserted into the port 20 of the pump housing 10. As shown in FIG. 2 & 3, the pressure and thermostatic relief valve assembly 22 includes at least the following components: (1) a pressure relief valve housing 26; (2) a pressure relief actuator 28; and (3) a pressure relief spring 30.
  • the pressure relief valve housing 26 includes a passage 32 for selectively providing flow communication between a discharge side pump housing portion 16 and a suction side pump housing portion 12.
  • the pressure relief actuator 28 positioned is positioned at least partially within this passage 32.
  • the pressure relief actuator 28 is movable between a closed position preventing flow communication between the discharge side and the suction side and an open position allowing flow communication between the discharge side and the suction side.
  • a pressure relief spring 30 is provided which biases the pressure relief actuator 28 in the closed position until a pressure difference between the discharge side and the suction side exceeds a predetermined amount.
  • the pressure and thermostatic relief valve 22 may also include an adjustment screw 34 for partially compressing the pressure relief spring 30 and thereby varying the bias on the pressure relief actuator 28.
  • the pressure relief actuator 28 further includes a thermostatic relief valve 36 incorporated into the pressure relief actuator 28.
  • the thermostatic relief valve includes a thermostatic relief valve shell 40 having an elongate inner bore 42 connecting a first opening 44 and a second opening 46. The first opening 44 is in flow communication with the pump housing discharge side while the second opening 46 is in flow communication with the pump housing suction side.
  • a thermostatic element 48 is disposed within the shell bore 42.
  • This thermostatic element 48 is preferably made from a wax, or a polymer, and is expandable at elevated temperatures and contracts at reduced temperatures.
  • the material and size of the thermostatic element is generally chosen so that the thermostatic relief valve is actuated at a temperature between about 100 °F to about 150 °F, preferably between about 130 °F to about 150 °F.
  • a thermostatic actuator piston 50 is movably disposed within the shell bore adjacent the thermostatic element 48. Expansion of the wax thermostatic element 48 under elevated temperature conditions moves this thermostatic actuator piston 50 from a first position to a second position.
  • the thermostatic relief valve 36 may also include a thermostatic actuator return spring 52 disposed within the shell bore 42 and biased against at least a portion of the thermostatic actuator piston 50 for returning the actuator piston 50 from the second position to the first position.
  • a poppet 54 is also movably disposed within the shell bore 42, adjacent the thermostatic actuator piston 50.
  • the poppet 54 moves between a closed position and an open position. In the closed position, the poppet 54 prevents fluid flow between the first and second shell openings, while in the open position, the poppet 54 permits fluid flow between the first and second shell openings.
  • Movement of the poppet 54 is controlled by thermostatic actuator piston 50 and a poppet return spring 56.
  • the poppet return spring 56 is disposed within the shell bore 42 and biased against the poppet 54. When the wax thermostatic element 48 contracts and the actuator piston 50 moves back, the poppet return spring 56 then returns the poppet 54 from the open position to the closed position, as shown in FIG. 2.
  • thermostatic valve When the thermostatic valve is in the open position, water or other pumped fluids may flow from the pump housing discharge side into the first opening 44 of the thermostatic relief valve and out the second opening 46 to the pump housing suction side.
  • the fluid flow paths F are indicated by arrows in FIGS. 3 and 4.
  • the present disclosure provides a pump housing and relief system wherein pump overpressurization and pump overheating may each be relieved separately and independently from one another.
  • Positive displacement pumps commonly include a pressure relief device in the event of extreme overpressurization within the pump. Excess pressure may be released through this device, thereby preventing catastrophic valve of the pump. Even in the absence of extreme overpressurization, however, pumps may still be damaged by overheating if the discharge flow is partially or fully blocked. In such case, water or other pumped fluids heat up within the pump and may flash into the vapor phase. In this situation, the pump can be heavily damaged due to thermal expansion of the parts during this overheating.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Safety Valves (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne une soupape de sûreté thermostatique et de retour pour un corps de pompe. La soupape de sûreté comprend un mécanisme de soupape de retour et un mécanisme de soupape de sûreté thermostatique ou thermique. L'invention concerne également un corps de pompe incorporant la soupape de sûreté thermostatique et de retour.
PCT/US2017/013375 2016-01-14 2017-01-13 Pompe à soupape de sûreté thermostatique WO2017123900A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17704113.4A EP3403011B1 (fr) 2016-01-14 2017-01-13 Pompe à soupape de sûreté thermostatique
ES17704113T ES2922523T3 (es) 2016-01-14 2017-01-13 Bomba con válvula de desahogo termostática

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/995,456 2016-01-14
US14/995,456 US9976550B2 (en) 2016-01-14 2016-01-14 Pump with thermostatic relief valve

Publications (1)

Publication Number Publication Date
WO2017123900A1 true WO2017123900A1 (fr) 2017-07-20

Family

ID=57995265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2017/013375 WO2017123900A1 (fr) 2016-01-14 2017-01-13 Pompe à soupape de sûreté thermostatique

Country Status (4)

Country Link
US (1) US9976550B2 (fr)
EP (1) EP3403011B1 (fr)
ES (1) ES2922523T3 (fr)
WO (1) WO2017123900A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110817162A (zh) * 2019-12-06 2020-02-21 上海依呗科技有限公司 一种液氧储存罐

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3425213B1 (fr) * 2017-07-03 2020-11-25 LEONARDO S.p.A. Soupape de sécurité et procédé de commande d'un circuit hydraulique
US11989043B2 (en) * 2021-08-30 2024-05-21 Kalsi Engineering, Inc. Miniature passive thermal control valve for mixing or splitting single-phase fluid with adjustable thermal actuator

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US2740586A (en) * 1953-08-24 1956-04-03 A W Cash Valve Mfg Corp Automatic pressure and temperature relief valve
US20070114290A1 (en) * 2000-10-25 2007-05-24 Grundfos Pumps Corporation Water control fixture having thermostatically controlled bypass valve
US20100078081A1 (en) * 2008-09-30 2010-04-01 Mckee Joseph R Temperature control valve
US20100200783A1 (en) * 2008-08-07 2010-08-12 Rostra Vernatherm LLC Integrated Freeze Protection and Pressure Relief Valve
US20140021650A1 (en) * 2011-03-14 2014-01-23 Standex International Corporation Plastic Pump Housing and Manufacture Thereof

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US1694492A (en) * 1927-07-02 1928-12-11 American Heater Corp Pressure and temperature control valve
US2747802A (en) * 1952-02-08 1956-05-29 Mcdonnell & Miller Inc Pressure and temperature relief valves
US2810527A (en) * 1954-02-03 1957-10-22 Erich W Work Temperature and pressure relief valve
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US3428251A (en) * 1967-02-07 1969-02-18 Pall Corp Temperature and pressure responsive valve
US3654768A (en) * 1970-06-16 1972-04-11 Vortec Corp Vortex tube cooling system
US4089461A (en) 1976-07-06 1978-05-16 Braukmann Armaturen A.G. Thermostatic radiator valve
US4231342A (en) * 1979-01-29 1980-11-04 General Motors Corporation Diesel fuel heat recovery system and control valve therefor
US4744382A (en) * 1987-04-29 1988-05-17 Aluminum Company Of America Combination thermal or pressure activated relief valve
US6530391B1 (en) * 2001-08-31 2003-03-11 Research By Copperhead Hill, Inc. Temperature activated valve
US6863504B2 (en) * 2002-02-28 2005-03-08 Standex International Corp. Fluid pump relief valve
US6837688B2 (en) * 2002-02-28 2005-01-04 Standex International Corp. Overheat protection for fluid pump
WO2012013231A2 (fr) 2010-07-28 2012-02-02 Air Products And Chemicals, Inc. Stockage de liquide intégré
WO2012013232A1 (fr) 2010-07-29 2012-02-02 Pierburg Pump Technology Gmbh Pompe à lubrifiant à palettes à déplacement variable
JP5903109B2 (ja) * 2011-03-14 2016-04-13 スタンデックス・インターナショナル・コーポレイションＳｔａｎｄｅｘ Ｉｎｔｅｒｎａｔｉｏｎａｌ Ｃｏｒｐｏｒａｔｉｏｎ プラスチックポンプハウジングおよびその製造

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740586A (en) * 1953-08-24 1956-04-03 A W Cash Valve Mfg Corp Automatic pressure and temperature relief valve
US20070114290A1 (en) * 2000-10-25 2007-05-24 Grundfos Pumps Corporation Water control fixture having thermostatically controlled bypass valve
US20100200783A1 (en) * 2008-08-07 2010-08-12 Rostra Vernatherm LLC Integrated Freeze Protection and Pressure Relief Valve
US20100078081A1 (en) * 2008-09-30 2010-04-01 Mckee Joseph R Temperature control valve
US20140021650A1 (en) * 2011-03-14 2014-01-23 Standex International Corporation Plastic Pump Housing and Manufacture Thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110817162A (zh) * 2019-12-06 2020-02-21 上海依呗科技有限公司 一种液氧储存罐

Also Published As

Publication number Publication date
ES2922523T3 (es) 2022-09-16
EP3403011A1 (fr) 2018-11-21
US9976550B2 (en) 2018-05-22
US20170204847A1 (en) 2017-07-20
EP3403011B1 (fr) 2022-04-27

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